Housing for an electric heater



FIG. 1 is a rear, right, perspective view of a housing for an electric heater showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a left side perspective view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a housing for an electric heater, as shown. 